/**
 * Copyright (c) 2015-2020, Michael Yang 杨福海 (fuhai999@gmail.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.jboot.db.model;


public class Group extends Column {

    private Columns columns;

    public Group(Columns columns) {
        this.columns = columns;
    }

    public Columns getColumns() {
        return columns;
    }

    public void setColumns(Columns columns) {
        this.columns = columns;
    }

    @Override
    public boolean hasPara() {
        return true;
    }

    @Override
    public Object getValue() {
        if (columns == null || columns.isEmpty()) {
            return null;
        } else {
            return Util.getValueArray(columns.getList());
        }
    }
}
